source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNADingfelderChargeDecreaseModel.cc @ 968

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26// $Id: G4DNADingfelderChargeDecreaseModel.cc,v 1.3 2009/02/16 11:00:11 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-02-ref-02 $
28//
29
30#include "G4DNADingfelderChargeDecreaseModel.hh"
31
32//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33
34using namespace std;
35
36//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
37
38G4DNADingfelderChargeDecreaseModel::G4DNADingfelderChargeDecreaseModel(const G4ParticleDefinition*,
39                                             const G4String& nam)
40:G4VEmModel(nam),isInitialised(false)
41{
42
43  verboseLevel= 0;
44  // Verbosity scale:
45  // 0 = nothing
46  // 1 = warning for energy non-conservation
47  // 2 = details of energy budget
48  // 3 = calculation of cross sections, file openings, sampling of atoms
49  // 4 = entering in methods
50 
51  G4cout << "Dingfelder charge decrease model is constructed " << G4endl;
52
53}
54
55//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
56
57G4DNADingfelderChargeDecreaseModel::~G4DNADingfelderChargeDecreaseModel()
58{}
59
60//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
61
62void G4DNADingfelderChargeDecreaseModel::Initialise(const G4ParticleDefinition* particle,
63                                       const G4DataVector& /*cuts*/)
64{
65
66  if (verboseLevel > 3)
67    G4cout << "Calling G4DNADingfelderChargeDecreaseModel::Initialise()" << G4endl;
68
69  // Energy limits
70 
71  G4DNAGenericIonsManager *instance;
72  instance = G4DNAGenericIonsManager::Instance();
73  G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
74  G4ParticleDefinition* alphaPlusPlusDef = instance->GetIon("alpha++");
75  G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+");
76
77  G4String proton;
78  G4String alphaPlusPlus;
79  G4String alphaPlus;
80
81  if (protonDef != 0)
82  {
83    proton = protonDef->GetParticleName();
84    lowEnergyLimit[proton] = 1. * keV;
85    highEnergyLimit[proton] = 10. * MeV;
86  }
87  else
88  {
89    G4Exception("G4DNADingfelderChargeDecreaseModel::Initialise: proton is not defined");
90  }
91
92  if (alphaPlusPlusDef != 0)
93  {
94    alphaPlusPlus = alphaPlusPlusDef->GetParticleName();
95    lowEnergyLimit[alphaPlusPlus] = 1. * keV;
96    highEnergyLimit[alphaPlusPlus] = 10. * MeV;
97  }
98  else
99  {
100    G4Exception("G4DNADingfelderChargeDecreaseModel::Initialise: alphaPlusPlus is not defined");
101  }
102
103  if (alphaPlusDef != 0)
104  {
105    alphaPlus = alphaPlusDef->GetParticleName();
106    lowEnergyLimit[alphaPlus] = 1. * keV;
107    highEnergyLimit[alphaPlus] = 10. * MeV;
108  }
109  else
110  {
111    G4Exception("G4DNADingfelderChargeDecreaseModel::Initialise: alphaPlus is not defined");
112  }
113
114  if (particle==protonDef) 
115  {
116    SetLowEnergyLimit(lowEnergyLimit[proton]);
117    SetHighEnergyLimit(highEnergyLimit[proton]);
118  }
119
120  if (particle==alphaPlusPlusDef) 
121  {
122    SetLowEnergyLimit(lowEnergyLimit[alphaPlusPlus]);
123    SetHighEnergyLimit(highEnergyLimit[alphaPlusPlus]);
124  }
125
126  if (particle==alphaPlusDef) 
127  {
128    SetLowEnergyLimit(lowEnergyLimit[alphaPlus]);
129    SetHighEnergyLimit(highEnergyLimit[alphaPlus]);
130  }
131
132  // Final state
133 
134    //PROTON
135  f0[0][0]=1.;
136  a0[0][0]=-0.180;
137  a1[0][0]=-3.600;
138  b0[0][0]=-18.22;
139  b1[0][0]=-1.997;
140  c0[0][0]=0.215;
141  d0[0][0]=3.550;
142  x0[0][0]=3.450;
143  x1[0][0]=5.251;
144
145  numberOfPartialCrossSections[0] = 1;
146
147  //ALPHA++
148  f0[0][1]=1.;  a0[0][1]=0.95;
149  a1[0][1]=-2.75;
150  b0[0][1]=-23.00;
151  c0[0][1]=0.215;
152  d0[0][1]=2.95;
153  x0[0][1]=3.50;
154
155  f0[1][1]=1.;
156  a0[1][1]=0.95;
157  a1[1][1]=-2.75;
158  b0[1][1]=-23.73;
159  c0[1][1]=0.250;
160  d0[1][1]=3.55;
161  x0[1][1]=3.72;
162
163  x1[0][1]=-1.;
164  b1[0][1]=-1.;
165
166  x1[1][1]=-1.;
167  b1[1][1]=-1.; 
168 
169  numberOfPartialCrossSections[1] = 2;
170
171  // ALPHA+
172  f0[0][2]=1.;
173  a0[0][2]=0.65;
174  a1[0][2]=-2.75;
175  b0[0][2]=-21.81;
176  c0[0][2]=0.232;
177  d0[0][2]=2.95;
178  x0[0][2]=3.53;
179
180  x1[0][2]=-1.;
181  b1[0][2]=-1.;
182 
183  numberOfPartialCrossSections[2] = 1;
184
185  //
186 
187  G4cout << "Dingfelder charge decrease model is initialized " << G4endl
188         << "Energy range: "
189         << LowEnergyLimit() / keV << " keV - "
190         << HighEnergyLimit() / MeV << " MeV for "
191         << particle->GetParticleName()
192         << G4endl;
193
194  if(!isInitialised) 
195  {
196    isInitialised = true;
197 
198    if(pParticleChange)
199      fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
200    else
201      fParticleChangeForGamma = new G4ParticleChangeForGamma();
202  }   
203
204  // InitialiseElementSelectors(particle,cuts);
205 
206  // Test if water material
207
208  flagMaterialIsWater= false;
209  densityWater = 0;
210
211  const G4ProductionCutsTable* theCoupleTable = G4ProductionCutsTable::GetProductionCutsTable();
212
213  if(theCoupleTable) 
214  {
215    G4int numOfCouples = theCoupleTable->GetTableSize();
216 
217    if(numOfCouples>0) 
218    {
219          for (G4int i=0; i<numOfCouples; i++) 
220          {
221            const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i);
222            const G4Material* material = couple->GetMaterial();
223
224            size_t j = material->GetNumberOfElements();
225            while (j>0)
226            {
227               j--;
228               const G4Element* element(material->GetElement(j));
229               if (element->GetZ() == 8.)
230               {
231                  G4double density = material->GetAtomicNumDensityVector()[j];
232                  if (density > 0.) 
233                  { 
234                    flagMaterialIsWater = true; 
235                    densityWater = density; 
236                   
237                    if (verboseLevel > 3) 
238                    G4cout << "Water material is found with density(cm^-3)=" << density/(cm*cm*cm) << G4endl;
239                  }
240               }
241            }
242 
243          }
244   } // if(numOfCouples>0)
245
246  } // if (theCoupleTable)
247
248}
249
250//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
251
252G4double G4DNADingfelderChargeDecreaseModel::CrossSectionPerVolume(const G4Material*,
253                                           const G4ParticleDefinition* particleDefinition,
254                                           G4double k,
255                                           G4double,
256                                           G4double)
257{
258  if (verboseLevel > 3)
259    G4cout << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeDecreaseModel" << G4endl;
260
261 // Calculate total cross section for model
262
263  G4DNAGenericIonsManager *instance;
264  instance = G4DNAGenericIonsManager::Instance();
265
266  if (
267      particleDefinition != G4Proton::ProtonDefinition()
268      &&
269      particleDefinition != instance->GetIon("alpha++")
270      &&
271      particleDefinition != instance->GetIon("alpha+")
272     )
273           
274    return 0;
275
276  G4double lowLim = 0;
277  G4double highLim = 0;
278  G4double crossSection = 0.;
279
280  if (flagMaterialIsWater)
281  {
282    const G4String& particleName = particleDefinition->GetParticleName();
283
284    std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
285    pos1 = lowEnergyLimit.find(particleName);
286
287    if (pos1 != lowEnergyLimit.end())
288    {
289      lowLim = pos1->second;
290    }
291
292    std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
293    pos2 = highEnergyLimit.find(particleName);
294
295    if (pos2 != highEnergyLimit.end())
296    {
297      highLim = pos2->second;
298    }
299
300    if (k >= lowLim && k < highLim)
301    {
302      crossSection = Sum(k,particleDefinition);
303    }
304 
305    if (verboseLevel > 3)
306    {
307      G4cout << "---> Kinetic energy(eV)=" << k/eV << G4endl;
308      G4cout << " - Cross section per water molecule (cm^2)=" << crossSection/cm/cm << G4endl;
309      G4cout << " - Cross section per water molecule (cm^-1)=" << crossSection*densityWater/(1./cm) << G4endl;
310    } 
311
312  } // if (flagMaterialIsWater)
313
314 return crossSection*densityWater;                 
315
316}
317
318//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
319
320void G4DNADingfelderChargeDecreaseModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
321                                              const G4MaterialCutsCouple* /*couple*/,
322                                              const G4DynamicParticle* aDynamicParticle,
323                                              G4double,
324                                              G4double)
325{
326  if (verboseLevel > 3)
327    G4cout << "Calling SampleSecondaries() of G4DNADingfelderChargeDecreaseModel" << G4endl;
328
329  G4double inK = aDynamicParticle->GetKineticEnergy();
330 
331  G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
332
333  G4int finalStateIndex = RandomSelect(inK,definition);
334 
335  G4int n = NumberOfFinalStates(definition, finalStateIndex);
336  G4double waterBindingEnergy = WaterBindingEnergyConstant(definition, finalStateIndex);
337  G4double outgoingParticleBindingEnergy = OutgoingParticleBindingEnergyConstant(definition, finalStateIndex);
338 
339  G4double outK = 0.;
340  if (definition==G4Proton::Proton())
341    outK = inK - n*(inK*electron_mass_c2/proton_mass_c2) - waterBindingEnergy + outgoingParticleBindingEnergy;
342  else
343    outK = inK - n*(inK*electron_mass_c2/(3728*MeV)) - waterBindingEnergy + outgoingParticleBindingEnergy;
344 
345  if (outK<0)
346  {
347    G4String message;
348    message="G4DNADingfelderChargeDecreaseModel::SampleSecondaries: final kinetic energy is below 0! Process ";
349    G4Exception(message);
350  }
351 
352  fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
353  fParticleChangeForGamma->ProposeLocalEnergyDeposit(waterBindingEnergy);
354 
355  G4DynamicParticle* dp = new G4DynamicParticle (OutgoingParticleDefinition(definition, finalStateIndex), 
356                                                        aDynamicParticle->GetMomentumDirection(), 
357                                                        outK) ;
358  fvect->push_back(dp);
359
360}
361
362//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
363
364G4int G4DNADingfelderChargeDecreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition, 
365                                                      G4int finalStateIndex )
366 
367{
368  if (particleDefinition == G4Proton::Proton()) return 1;
369 
370  G4DNAGenericIonsManager*instance;
371  instance = G4DNAGenericIonsManager::Instance();
372 
373  if (particleDefinition == instance->GetIon("alpha++") ) 
374  {
375    if (finalStateIndex==0)  return 1;
376    return 2;   
377  }
378 
379  if (particleDefinition == instance->GetIon("alpha+") ) return 1;
380 
381  return 0;
382}
383
384//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
385
386G4ParticleDefinition* G4DNADingfelderChargeDecreaseModel::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition, 
387                                                                              G4int finalStateIndex) 
388{
389  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
390 
391  if (particleDefinition == G4Proton::Proton()) return instance->GetIon("hydrogen"); 
392 
393  if (particleDefinition == instance->GetIon("alpha++") ) 
394  {
395    if (finalStateIndex == 0) return instance->GetIon("alpha+"); 
396    return instance->GetIon("helium");   
397  }
398 
399  if (particleDefinition == instance->GetIon("alpha+") ) return instance->GetIon("helium");   
400 
401  return 0;
402}
403
404//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
405
406G4double G4DNADingfelderChargeDecreaseModel::WaterBindingEnergyConstant(G4ParticleDefinition* particleDefinition, 
407                                                                G4int finalStateIndex )
408{
409  // Ionization energy of first water shell
410  // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
411  // W + 10.79 eV -> W+ + e-
412 
413  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
414 
415  if(particleDefinition == G4Proton::Proton()) return 10.79*eV;
416
417  if (particleDefinition == instance->GetIon("alpha++") ) 
418  {
419      // Binding energy for    W+ -> W++ + e-    10.79 eV
420      // Binding energy for    W  -> W+  + e-    10.79 eV
421      //
422      // Ionization energy of first water shell
423      // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
424
425      if (finalStateIndex == 0) return 10.79*eV;
426 
427      return 10.79*2*eV;
428  }
429
430  if (particleDefinition == instance->GetIon("alpha+") ) 
431  {
432      // Binding energy for    W+ -> W++ + e-    10.79 eV
433      // Binding energy for    W  -> W+  + e-    10.79 eV
434      //
435      // Ionization energy of first water shell
436      // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
437
438      return 10.79*eV;
439  }
440 
441  return 0;
442}
443
444//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
445
446G4double G4DNADingfelderChargeDecreaseModel::OutgoingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition, 
447                                                                           G4int finalStateIndex)
448{
449  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
450 
451  if(particleDefinition == G4Proton::Proton()) return 13.6*eV;
452
453  if (particleDefinition == instance->GetIon("alpha++") ) 
454  {
455      // Binding energy for    He+ -> He++ + e-    54.509 eV
456      // Binding energy for    He  -> He+  + e-    24.587 eV
457
458      if (finalStateIndex==0)   return 54.509*eV;
459     
460      return (54.509 + 24.587)*eV;
461  }
462 
463  if (particleDefinition == instance->GetIon("alpha+") ) 
464  {
465      // Binding energy for    He+ -> He++ + e-    54.509 eV
466      // Binding energy for    He  -> He+  + e-    24.587 eV
467     
468      return 24.587*eV;
469  } 
470 
471  return 0;
472}
473
474//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
475
476G4double G4DNADingfelderChargeDecreaseModel::PartialCrossSection(G4double k, G4int index, 
477                                                           const G4ParticleDefinition* particleDefinition)
478{
479  G4int particleTypeIndex = 0;
480  G4DNAGenericIonsManager* instance;
481  instance = G4DNAGenericIonsManager::Instance();
482
483  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
484  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
485  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
486
487  //
488  // sigma(T) = f0 10 ^ y(log10(T/eV))
489  //
490  //         /  a0 x + b0                    x < x0
491  //         |
492  // y(x) = <   a0 x + b0 - c0 (x - x0)^d0   x0 <= x < x1
493  //         |
494  //         \  a1 x + b1                    x >= x1
495  //
496  //
497  // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
498  //
499  // f0 has been added to the code in order to manage partial (shell-dependent) cross sections (if no shell dependence is present. f0=1. Sum of f0 over the considered shells should give 1)
500  //
501  // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
502  // Inelastic-collision cross sections of liquid water for interactions of energetic proton
503  //
504 
505  if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex])
506  {
507      //
508      // if x1 < x0 means that x1 and b1 will be calculated with the following formula (this piece of code is run on all alphas and not on protons)
509      //
510      // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
511      //
512      // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
513      //
514 
515      x1[index][particleTypeIndex]=x0[index][particleTypeIndex] + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) 
516                                                                           / (c0[index][particleTypeIndex] * d0[index][particleTypeIndex]), 1. / (d0[index][particleTypeIndex] - 1.));
517      b1[index][particleTypeIndex]=(a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex] 
518        + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x1[index][particleTypeIndex] 
519                                                                                 - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
520  }
521
522  G4double x(std::log10(k/eV));
523  G4double y;
524 
525  if (x<x0[index][particleTypeIndex])
526    y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
527  else if (x<x1[index][particleTypeIndex])
528    y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] 
529      * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
530  else
531    y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
532
533  return f0[index][particleTypeIndex] * std::pow(10., y)*m*m;
534 
535}
536
537G4int G4DNADingfelderChargeDecreaseModel::RandomSelect(G4double k, 
538                                                        const G4ParticleDefinition* particleDefinition)
539{
540  G4int particleTypeIndex = 0;
541  G4DNAGenericIonsManager *instance;
542  instance = G4DNAGenericIonsManager::Instance();
543
544  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex = 0;
545  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex = 1;
546  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex = 2;
547
548  const G4int n = numberOfPartialCrossSections[particleTypeIndex];
549  G4double* values(new G4double[n]);
550  G4double value(0);
551  G4int i = n;
552 
553  while (i>0)
554  {
555      i--;
556      values[i]=PartialCrossSection(k, i, particleDefinition);
557      value+=values[i];
558  }
559 
560  value*=G4UniformRand();
561 
562  i=n;
563  while (i>0)
564  {
565      i--;
566   
567      if (values[i]>value)
568        break;
569 
570      value-=values[i];
571  }
572 
573  delete[] values;
574 
575  return i;
576}
577
578//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
579
580G4double G4DNADingfelderChargeDecreaseModel::Sum(G4double k, const G4ParticleDefinition* particleDefinition)
581{
582  G4int particleTypeIndex = 0;
583  G4DNAGenericIonsManager* instance;
584  instance = G4DNAGenericIonsManager::Instance();
585
586  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
587  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
588  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
589
590  G4double totalCrossSection = 0.;
591
592  for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++)
593  {
594    totalCrossSection += PartialCrossSection(k,i,particleDefinition);
595  }
596  return totalCrossSection;
597}
598
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